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Established in 2001, Puyang Zhong Yuan Restar Petroleum Equipment Co.,Ltd, “RSD” for short, is Henan’s high-tech enterprise with intellectual property advantages and independent legal person qualification. With registered capital of RMB 50 million, the Company has two subsidiaries-Henan Restar Separation Equipment Technology Co., Ltd We are mainly specialized in R&D, production and service of various intelligent separation and control systems in oil&gas drilling,engineering environmental protection and mining industries.We always take the lead in Chinese market shares of drilling fluid shale shaker for many years. Our products have been exported more than 20 countries and always extensively praised by customers. We are Class I network supplier of Sinopec,CNPC and CNOOC and registered supplier of ONGC, OIL India,KOC. High quality and international standard products make us gain many Large-scale drilling fluids recycling systems for Saudi Aramco and Gazprom projects.

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ARRESTED METHANOGENESIS FOR VOLATILE FATTY ACID …
ARRESTED METHANOGENESIS FOR VOLATILE FATTY ACID …

• 6 Different ,wastewater, composition (,COD, and mixing ratio) • The family Bacillaceae was found in all samples • Facultative anaerobe • Certain strains breaks down complex carbohydrates • Others produce lactic ,acid, • The family Clostridiaceae was also identified • Obligate anaerobes • Break down simple sugars to produce

Hydrogen Sulfide Corrosion In Wastewater Collection And ...
Hydrogen Sulfide Corrosion In Wastewater Collection And ...

Wastewater, pH measurements were 6 at four of the industrial sites, 5.5 at one site, and 10 at the remaining site. ,Wastewater, sulfide ranged from 0.0 to 0.3 mg/1. The ,wastewater, sulfide level was 0.05 mg/1 at the site where ,wastewater, pH was 5.5, and 0.0 mg/1 at the site where ,wastewater, pH was 10.

Selective Removal of Heavy Metals from Acidic Wastewater ...
Selective Removal of Heavy Metals from Acidic Wastewater ...

Magazine: Identification of Heavy-Metals in ,Wastewater, Acidic ,wastewater, containing heavy metals and arsenic is produced by industrial processes such as ,metal, smelting or mineral processing. This strongly contaminated water poses a severe environmental risk and requires extensive treatment.

Hydrogen Sulfide Corrosion In Wastewater Collection And ...
Hydrogen Sulfide Corrosion In Wastewater Collection And ...

Wastewater, pH measurements were 6 at four of the industrial sites, 5.5 at one site, and 10 at the remaining site. ,Wastewater, sulfide ranged from 0.0 to 0.3 mg/1. The ,wastewater, sulfide level was 0.05 mg/1 at the site where ,wastewater, pH was 5.5, and 0.0 mg/1 at the site where ,wastewater, pH was 10.

The Treatment of High Concentration Dyeing Wastewater with ...
The Treatment of High Concentration Dyeing Wastewater with ...

water was evaporated to become concentrated sulphuric ,acid,, in order for the cotton fibers to be carbonized. The cellulose fibers were hydrolyzed to form the printing. Therefore, the ,wastewater, contained a large amount of refractory organic pollutants, ,with COD, levels at approximately ,10000, mg/L, ammonia nitrogen between 400

Determination of Heavy Metals in Wastewater and Their ...
Determination of Heavy Metals in Wastewater and Their ...

acidified with 1 ml nitric ,acid,, for later analysis of ,metal, concentrations. The purpose of the ,acid, is to keep the metals in solution and to avoid adsorption to the container walls (APHA, 1999). Digestion of ,wastewater, samples The water samples from each sampling bottle were mixed thoroughly by shaking. A 50 ml filtered aliquot of water sample was

Reductions in cod and acute toxicity of wastewater ...
Reductions in cod and acute toxicity of wastewater ...

Table 2 presents chemical and physical parameters of the RCP ,wastewater, in the experiments after acidification. 2 Water quality of raw RCP ,wastewater, after acidification Parameter Raw water sample After acidification ,COD, (mg L −1 ) 15,000 ± 215 12,864 ± 291 ,COD, removal (%) — 29% Conductivity (µs cm −1 ) 6730 ± 13 8400 ± 2 Chrominance (°) 6250 ± 29 5500 ± 4 BOD (mg L −1 ) 4190 ...

Pretreatment of Municipal Wastewater by Enhanced Chemical ...
Pretreatment of Municipal Wastewater by Enhanced Chemical ...

municipal ,wastewater, treatment plant. Applying of lime and FeO 3 as chemical coagulants, reduced the BOD, ,COD, and TSS levels 27-53, 25-59, 46-94 percent, respectively and showed that the pretreated ,wastewater, can be discharged into municipal ,wastewater, treatment plant in terms of quality (Mahvi, et al., 2005). In 2005, Amuda et

Methanogenic Microorganisms in Industrial Wastewater ...
Methanogenic Microorganisms in Industrial Wastewater ...

Anaerobic techniques are typically used for high-loaded wastewaters, expressed in ,chemical oxygen demand, (,COD,), typically greater than 1500–2000 mg/L. The application of anaerobic ,wastewater, treatment is largely confined to relatively heavily polluted ,wastewater, with a ,COD, between 3000 and 40,000 mg/L, e.g., in the sugar, starch, fruit and vegetable and alcoholic drinks sectors.

Hydrogen Production in the Anaerobic Treatment of Domestic ...
Hydrogen Production in the Anaerobic Treatment of Domestic ...

kitchen sink disposers, thus leading to an organic strength of more than ,10,000, mg ,COD,/L [4]. Among the various advanced and sophisticated technologies available for treatment of waste and ,wastewater,, the bioremediation technique is considered simple and easy for applications in

Heavy metals in wastewater - ecoprofi.info
Heavy metals in wastewater - ecoprofi.info

HEAVY METALS IN ,WASTEWATER, ANALYSING HEAVY METALS IN ,WASTE WATER, •,Waste water, samples are usually digested using microwave digestion in aqua regia or strong nitric ,acid, •Analyses of the elements are performed using ICP-MS technique •Method is based on the SFS-EN ISO 17294-2 …

Pretreatment of Municipal Wastewater by Enhanced Chemical ...
Pretreatment of Municipal Wastewater by Enhanced Chemical ...

municipal ,wastewater, treatment plant. Applying of lime and FeO 3 as chemical coagulants, reduced the BOD, ,COD, and TSS levels 27-53, 25-59, 46-94 percent, respectively and showed that the pretreated ,wastewater, can be discharged into municipal ,wastewater, treatment plant in terms of quality (Mahvi, et al., 2005). In 2005, Amuda et

Recent Overview of Solar Photocatalysis and Solar Photo ...
Recent Overview of Solar Photocatalysis and Solar Photo ...

Citrus ,wastewater, (,COD, initial of ,10,000, mg O 2 L ... (,COD,) removal was achieved. High enhancement of the biodegradability of textile synthetic ,wastewater, with the use of oxalic ,acid, in the ,solar photo-Fenton, process (ferrioxalate) was also reported ; in such study, the iron precipitated when ,over, 70% of the initially added oxalic ,acid, was ...

Enhanced Heavy Metal Removal from Acid Mine Drainage ...
Enhanced Heavy Metal Removal from Acid Mine Drainage ...

Due to the unique properties of carbon nanotubes (CNTs), they have attracted great research attention as an emergent technology in many applications including water and ,wastewater, treatment. However, raw CNTs have few functional groups, which limits their use in heavy ,metal, removal.

Wastewater Laboratory Procedures And Chemistry
Wastewater Laboratory Procedures And Chemistry

If the ,wastewater, is exposed to the atmosphere, H2S will be released and a typical rotten egg odor will be detected. Anaerobic bacteria found in ,wastewater, can liberate H2S from the solids. When the gas leaves the ,wastewater, stream and comes in contact with moisture and oxygen, sulfuric ,acid, is formed which is very corrosive to concrete.

PCDDs/PCDFs and PCBs in Wastewater and Sewage Sludge ...
PCDDs/PCDFs and PCBs in Wastewater and Sewage Sludge ...

8/4/2016, · The chapter includes the information concerning the ,wastewater, treatment plants (WWTPs) functioning in respect to polychlorinated dibenzo‐p‐dioxins (PCDDs)/polychlorinated dibenzofurans (PCDFs) and polychlorinated biphenyls (PCBs). In particular, the chapter describes the occurrence and fate of PCDDs/PCDFs and PCBs in WWTPs, at different treatment stages, including the tertiary ,wastewater, …

Heavy metal removal from wastewater using various ...
Heavy metal removal from wastewater using various ...

These acids work as good chelating agents, so they become polymerised with, sugarcane, bagasse because it increases the number of chelating sites and helps in heavy metal removal from wastewater. Garg et al. used succinic acid for modification of, sugarcane, bagasse and reported 92% removal obtained at an optimum pH of 2.

Heavy Metal Complexes Wastewater Treatment with Chelation ...
Heavy Metal Complexes Wastewater Treatment with Chelation ...

Coexistence of these, heavy metal, complexes did not affect the efficiency significantly. Because chelator can be used directly to treat, acidic wastewater, containing, heavy metals,, it is unnecessary to destroy the constitution of metal complexes preliminarily, and therefore the cost for pH adjustment can be saved and the treatment process can be simplified.

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